Hydrocarbon Boiling Melting Flash Autoignition Point Density Gravity Molweight

Reference data and engineering information about hydrocarbon boiling melting flash autoignition point density gravity molweight for chemistry applications.

hydrocarbonboilingmeltingflashData Table

Overview

Engineering reference data for Hydrocarbon Boiling Melting Flash Autoignition Point Density Gravity Molweight in chemistry.

Key Formulas

Ideal Gas Law

$PV = nRT$

Pressure × Volume = moles × gas constant × temperature.

Molarity

$M = \frac{n}{V}$

Moles of solute per liter of solution.

pH

$pH = -\log_{10}[H^+]$

Measure of acidity.

Variables

Symbol	Description	Unit
$P$	Pressure	Pa
$V$	Volume	m³
$n$	Moles	mol
$R$	Gas constant	8.314 J/(mol·K)

Hydrocarbon Physical Data Table

The following table provides comprehensive physical properties for common hydrocarbons, including molecular weight, melting/boiling points, density, flash point, and autoignition temperature. This data is essential for process engineering, safety analysis, and chemical system design.

23 rows

Physical properties of common hydrocarbons. Data includes straight-chain (N-alkane), branched (methylalkane), and unsaturated (1-alkene) classes.
Class	IUPAC Name	Common Name	#C	#H	Molecular Weight(g/mol)	Melting Point(°C)	Boiling Point(°C)	Density @20°C(g/mL)	Flash Point(°C)	Autoignition Temp.(°C)
N-alkane	Methane		1	4	16.04	-183	-162	—	-135	595
N-alkane	Ethane		2	6	30.07	-183	-89	—	-135	515
N-alkane	Propane		3	8	44.09	-188	-42	0.498	-104	470
N-alkane	N-butane	Butane	4	10	58.12	-138	-1	0.577	-60	365
N-alkane	N-pentane	Pentane	5	12	72.15	-130	36	0.63	-49	260
N-alkane	N-hexane	Hexane	6	14	86.17	-95	69	0.664	-20	230
N-alkane	N-heptane	Heptane	7	16	100.2	-91	98	0.683	-7	220
N-alkane	N-octane	Octane	8	18	114.22	-57	126	0.702	12	205
N-alkane	N-nonane	Nonane	9	20	128.25	-53	151	0.719	31	205
N-alkane	N-decane	Decane	10	22	142.28	-30	174	0.73	46	200
2-methylalkane	2-methylpropane	iso-butane	4	10	58.12	-160	-12	0.555	-83	460
2-methylalkane	2-methylbutane	Iso-pentane	5	12	72.15	-160	28	0.62	-51	420
2-methylalkane	2-methylpentane	iso-hexane	6	14	86.17	-154	60	0.653	-7	300
2,2-dimetylalkane	2,2-dimethylpropane	Neo-pentane	5	12	72.15	-17	10	0.59	-19	450
2,2-dimetylalkane	2,2-dimethylbutane	Neohexane	6	14	86.17	-100	50	0.649	-48	435
Trimetylalkane	2,2,4-Trimetylpentane	Iso-octane	8	18	114.22	-107	99	0.69	—	396
1-alkene	Ethene	Ethylene	2	4	28.05	-169	-104	—	—	440
1-alkene	Propene	Propylene	3	6	42.08	-185	-48	0.51	-108	485
1-alkene	But-1-ene	1-butene	4	8	56.1	-185	-6	0.593	-80	360
1-alkene	1-pentene	n-amylene	5	10	70.13	-165	30	0.641	-51	280
1-alkene	1-hexene		6	12	84.16	-140	64	0.673	-26	255
1-alkene	1-heptene	1-heptylene	7	14	98.18	-119	94	0.697	-8	250
1-alkene	1-octene	1-caprylene	8	16	112.21	-102	121	0.715	10	240

Source: engineeringtoolbox.com

Note: The table above shows a representative sample of the data. The complete dataset includes over 200 hydrocarbons up to N-hectane (C₁₀₀). Key observations from the data:

Trends with chain length: For straight-chain alkanes, molecular weight, melting/boiling points, and density generally increase with carbon number.
Branching effects: Branched isomers (e.g., iso-butane vs. n-butane) typically have lower melting/boiling points and flash points compared to their straight-chain counterparts.
Safety properties: Flash point and autoignition temperature are critical for fire safety; lower flash points indicate higher flammability risk at ambient temperatures.